Stay-bolt structure.



STAY son STRUCTURE LICATION FILED 1,293,376. Patented Feb.4,1919.

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ETHAN I. DODD-S, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 FLANNERY BOLT COMPANY, QF PITTSBURGH, PENNSYLVANIA.

STAY-BOLT STRUCTURE.

Specification of Letters Patent.

Application filed May 3, 1918. Serial No. 232,314.

To all whom it may concern Be it known that I, ETHAN I. DoDps, a citizen of the United States, and a resident of Pittsburgh, in the county of Alleghenywill enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures and more particularly to the devices which inclose the headed end of a staybolt,the object of the invention being to provide a simple structure which will permit ready and quick access to the head of the bolt for testing purposes.

With this and other objects in view, the invention consists in certain novel features of construction and combination of parts as hereinafter more fully described and pointed out in the claims.

In the accompanying drawings, Figure l is a sectional view showing an embodiment of my invention. Fig. 2 is a transverse section, and Figs. 3 and 4 are views of modifications.

1 represents a boiler sheet having an opening formed with a curved wall 2 to afford a bearing for the rounded or spherical head 3 of a staybolt 4, and a portion of said opening is made tapering as at 5 to permit play of the staybolt.

A sleeve or ring 6 is welded as at 7 to the outer face of the boiler sheet and is disposed to surround the opening in the latter in which the head of the bolt has its bearing, and into this sleeve or ring the head of the staybolt projects. At its free edge the sleeve or ring 6 is provided externally with segmental shoulders 8. A cap 9 is seated on the end of the sleeve or ring 6 as shown at 10 and this cap is made with a peripheral flange 11 which encircles the shouldered free end of said sleeve or ring. At its free rear edge, the flange 11 of the cap is provided with inwardly projecting segmental shoulders 12 adapted to engage behind the external segmental shoulders 8 of the sleeve or ring 6 and secure said cap firmly to the sleeve or ring 6.

By turning the cap 9 with the use of a Copies of this patent may be obtained for five cents each, by addressing the Washington, D. 0.

suitablewrench, until the segmental shoulders 12 shall have moved out of line with the segmental shoulders 8, the cap may be at once removed to expose the head of the bolt for testing purposes.

In the form of the invention shown in Fig. 3, a ring 13 is welded to the boiler sheet 1 and provided at its outer edge with seg mental shoulders 14 projecting inwardly therefrom. This ring 13 is also provided with an inwardly projecting flange 15 which constitutes a seat for the inner edge of a cap 16 which enters within the confines of the ring 13 and is provided eXteriorly with segmental lugs 17 to engage behind the segmental lugs 14 of said ring.

In the form of the invention shown in Fig. 1, the inwardly projecting flange 15, shown in Fig. 3 is omitted and in its stead a washer 18 is applied to the boiler sheet within the inner edge portion of said ring.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is:

' 1. The combination with a boiler sheet having an opening afiording a bearing for the head of a staybolt, of a sleeve surrounding said opening and secured to the boiler sheet, and a cap mounted on said sleeve and having interlocking connection therewith.

2. The combination with a boiler sheet having an opening afiording a bearing for the head of a staybolt, of a sleeve secured to the boiler sheet and surrounding said opening, and a cap for closing said sleeve, said sleeve and cap provided with cooperating shoulders, whereby the cap is locked to the sleeve and quickly removable therefrom.

8. The combination with a boiler sheet having an opening affording a bearing for the head of a staybolt, of a sleeve welded to said boiler sheet and provided at its free edge with segmental shoulders, and a cap for closing said sleeve and provided with segmental shoulders to engage the segmental shoulders of said sleeve.

In testimony whereof, I have signed this specification in the presence of two subscrib- 1ng witnesses.

ETHAN I. DODDS. Witnesses:

S. G. NOTTINGHAM, R. S. FERGUSON.

Commissioner of latenta, 

